package com.grep.base.util;

/**
 * MD5 
 */
import java.security.MessageDigest;

import sun.misc.BASE64Decoder;



public class MD5Encrypt {
	
	
	
	public MD5Encrypt() {
	}

	private final static String[] hexDigits = { "0", "1", "2", "3", "4", "5",
			"6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };

	/**
	 *  
	 * 
	 * @param b
	 *             
	 * @return 16 
	 */
	public static String byteArrayToString(byte[] b) {
		StringBuffer resultSb = new StringBuffer();
		for (int i = 0; i < b.length; i++) {
			resultSb.append(byteToHexString(b[i]));
			//resultSb.append(byteToNumString(b[i]));
		}
		return resultSb.toString();
	}

	private static String byteToNumString(byte b) {

		int _b = b;
		if (_b < 0) {
			_b = 256 + _b;
		}

		return String.valueOf(_b);
	}

	private static String byteToHexString(byte b) {
		int n = b;
		if (n < 0) {
			n = 256 + n;
		}
		int d1 = n / 16;
		int d2 = n % 16;
		return hexDigits[d1] + hexDigits[d2];
	}

	public static String MD5Encode(String origin) {
		String resultString = null;

		try {
			resultString = new String(origin);
			MessageDigest md = MessageDigest.getInstance("MD5");
			resultString = byteArrayToString(md.digest(resultString.getBytes()));
		} catch (Exception e) {
			e.printStackTrace();
		}
		return resultString;
	}

	
   
	  public   static   String   getBASE64(String   s)   {   
	      if   (s   ==   null) {
			return   null;
		}   
	      return   (new   sun.misc.BASE64Encoder()).encode(   s.getBytes()   );   
	  }   
	    
	    
	  public   static   String   getFromBASE64(String   s)   {   
	      if   (s   ==   null) {
			return   null;
		}   
	      BASE64Decoder   decoder   =   new   BASE64Decoder();   
	      try   {   
	          byte[]   b   =   decoder.decodeBuffer(s);   
	          return   new   String(b);   
	      }   catch   (Exception   e)   {   
	          return   null;   
	      }   
	  }
	  public static void main(String args[]){
		System.out.println(MD5Encode("123456"));
	  }
}
